You can read RSS feeds and add the filters to it so that you are notified for those feeds which matches (does not match) the filter.

1) Add the feed
2) Add the filter of type Include or Exclude
3) Include filter will make sure that filter text is searched through feed and if Feed contains it then only you get notification for it.
4) Exclude filter will make sure that you don't see the feed in which you are not interested.